Machinery for manufacturing paper



UNITED STATES PATENT OFFICE.

STEPHEN ROSSMAN, OF STUYVESANT, NE\V YORK.

MACHINERY FOR MANUFACTURING PAPER.

Specification of Letters Patent N0. 19,045, dated January 5, 1858i.

To all whom -it may concern:

Be it known that I, STEPHEN RossMAN, of Stuyvesant, in the county ofColumbia and State of New York, have invented a new ,f and usefulImprovement in Machinery for Manufacturing Paper; and I do herebydeclare that the following is a full, clear, and eXact description ofthe same, reference being had to the accompanying drawings, forming partof this specification, in which- Figure l, is a sectional elevation ofthat part of the machinery used in the manufacture, known as the secondpress. Fig. 2, is a plan of the same.

Similar letters of reference indicate cor responding parts in bothfigures.

The object of my improvement is to prevent the breaking or tearing ofthe paper, as it passes from the upper one of the second press rolls tothe drier.

My improvement consists in lifting the web of paper from the upper pressroll by means of a lifting rol-ler, arranged and operated substantiallyas hereinafter set forth. The slight adhesion of the web to this smallroll eases it ofl1 the upper press roll and prevents it breaking, and ifa slight break should occur in the web, it prevents the edge of thebreak being carried under the edge of the doctor and the break beingthereby en larged. This improvement, though simple in its character, ishighly important in its results and it is found by practice to effect agreat increase in the quantity of paper produced in a given time, bysaving all or nearly all the time sacrificed by the breakages of the webthat occur when it is not used.

To enable others skilled in the art to apply my invention, I willdescribe it with reference to the drawings.

A, is the framing of the machinery. B, is the lower press roll and C, isthe upper press roll. D, is t-he doctor. E, is the blanket. All theseparts may be arranged and constructed in the usual manner.

F, is the lifting roll whose use constitutes my improvement. This rollmay be of wood, metal or other suitable material. It is represented ashaving its journals fitted to guides a, a, attached to the housings Gr,G, of the press rolls, and to be resting on the upper press roll, butinstead of being fitted to guides, the journals '6, may rest in bearingssimilarly arranged to the guides a, a, to keep the periphery of the rollF, at a short distance from that of the upper press roll C, withoutresting upon it. Motion is given to the said roll F by gear ing from theupper press roll or by other convenient means to give its periphery thesanlie velocity as the peripheries of the press rol s.

The web, the section of which is indicated in Fig. l, by a red line, isconducted by the blanket between the two press rolls and then, leavingthe blanket, passes upward and returns over the top of the upper pressroll, all in the usual manner and at the line where it should leave thesurface of the upper press roll it comes in contact with the surface ofthe roll F, and by its slight adhesion to the said surface is eased offthe press roll.

It will be observed that the lifting roll F rotates in a contrarydirection to the press roll C.

In ordinary paper machines, no lifting roll like my roll F, is employedto lift the paper from the press roll C, but the paper passes from theperiphery of said press roll in a straight line to the periphery ofanother roll, the shaft of which is on the same parallel line as theshaft of the doctor D. The situation of this latter roller and also theline of movement of the web of paper from the periphery of the pressroll C, is shown by the blue outlines in Fig. l. It will be seen thatthe web of paper, under this arrangement, has no support between theperiphery of the press roll C, and the blue outline roller justmentioned; consequently the weight of the paper has a tendency to tearor break the web. This liability to break or tear is greatly increasedowing to the fact that the press roll C rotates in the same directionthat the paper moves; and as there is a slight adhesion between the webof paper and the periphery of the roll C, the latter tends to pull downand carry along with itself the web of paper. If the web of paper is notsufficiently strong to resist this tendency, it becomes torn or broken.Much care, watchfulness, and labor is required on the part of theattendant to guide and unite the paper when thus broken. The frequencyof the breaks causes much waste of paper. By the use of a lifting roll Fto disengage the web of paper from the roll C, all the abovedifficulties are overcome. The roll F not only serves to lift the webfrom the press roll C, but also as a support to 1 manufacture of paper,to lift the web from l;

the paper after leaving the roll. 'Ihis is owing to the adhesion of theweb to the roll F. The web falls from the roll F by its own gravity, asit moves along to the drying rollers.

I am aware that the use of guide rollers in various relations to themain cylinders is common in paper machinery. Examples are seen in thepatents of Gr. WV. Turner, Jan. 27, 1852, and D. Gr. Jones, Dec. l1,1855. I make no claim to anything contained in those devices. But to thebest of my knowledge and belief, it is new in the.

the press roll, as I have described; and therefore Having thus describedmy invention, what I claim as new and desire to secure by LettersPatent, is:

Lifting the web of paper from the upper press roll C, by means of alifting roll F, arranged and operating substantially as herein setforth.

STEPHEN ROSSMAN.

Titnesses RIGHD. MARVIN, HENRY G. CLow.

